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Fix on delete cascade entity order (#20949) 

* Fix on delete cascade entity order

Since [#20708](https://github.com/netbox-community/netbox/pull/20708)
relation with a on delete RESTRICT are not deleted in the proper order.
Then the error `violate not-null constraint` occurs and breaks the
delete cascade feature.

* Revert unrelated and simplify changes
This commit is contained in:
Vincent Simonin 2025-12-22 19:19:02 +01:00 committed by GitHub
parent f7219e0672
commit 3acbb0a08c
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1 changed files with 2 additions and 2 deletions
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4
netbox/core/signals.py
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@ -3,7 +3,7 @@ from threading import local
from django.contrib.contenttypes.models import ContentType
from django.core.exceptions import ObjectDoesNotExist, ValidationError
from django.db.models import CASCADE
from django.db.models import CASCADE, RESTRICT
from django.db.models.fields.reverse_related import ManyToManyRel, ManyToOneRel
from django.db.models.signals import m2m_changed, post_migrate, post_save, pre_delete
from django.dispatch import receiver, Signal
@ -221,7 +221,7 @@ def handle_deleted_object(sender, instance, **kwargs):
obj.snapshot() # Ensure the change record includes the "before" state
if type(relation) is ManyToManyRel:
getattr(obj, related_field_name).remove(instance)
elif type(relation) is ManyToOneRel and relation.null and relation.on_delete is not CASCADE:
elif type(relation) is ManyToOneRel and relation.null and relation.on_delete not in (CASCADE, RESTRICT):
setattr(obj, related_field_name, None)
obj.save()